Keeping a liquid-filled pH probe hydrated is essential in order to get accurate readings of your nutrient solution. Accurate readings allow you to adjust nutrients as required to maximise uptake and see a healthy, fast growing, productive crop.

Growth Technology pH Refill and Storage Solution (KCL Solution) keeps your probes in optimum condition. This dilute potassium chloride fluid prevents probes from drying out, maintains the correct base-level sensitivity, and increases probe longevity.

• Essential for accurate readings of your nutrient solution
• Accurate readings allow you to adjust nutrients as required
• Maintains the correct base-level sensitivity
• Increases probe longevity

Order and pay online before 1pm for free, same-day, in-store collection (Mon to Sat).

Order and pay online after 1pm, or on a Sunday, or on a Bank Holiday for free, next-day, in-store collection.

* Please await your ‘Order Ready’ email before setting out to collect your order. *

On orders over £99 we offer free standard U.K. delivery* within 1-3 days of your order being placed.

Your goods will be transported securely, discreetly, and with tracking to ensure you have the best possible idea of when they’ll be delivered.

*exclusions and surcharges may apply, please see full Delivery Information for details.